mtg one booster box Draft (36ct) Modern Horizons (MH1) — Twenty Sided that feature new and returning mechanics as well as art from new and returning Lorwyn artists Episode 267 - Phyrexia Phryday:

This set will probably be the worst thing to happen to me financially and I really could just not spend the money, but that also mean I really could let everyone else play Bahamut

The deck also runs Archivist of Oghma which will give you a life point and draw you a card every time an opponent searches their library

Or discard like Liliana's Specter, or recursion like Reanimate, you get the idea

Sephiroth on the other hand plays into the usual control strategies favored by Blue/Black by growing in strength for every opposing creature you remove from play

Because Doubling Season can allow Planeswalkers to enter the battlefield with double counters, it can create a lot of oops, I win scenarios where one player wins out of nowhere

Isochron Scepter had a good theoretical case, but has yet to build up a good enough resume